Since the stackapps FAQ doesn't really address this, and everything I list below could be acceptable when there is so much to discuss, is there an accepted etiquette to what "answers" should address ...

The /sites method is used to enumerate all sites in the network. If your [app] is meant to run against more than a single site (and many are) this method is how you should be discovering new sites in ...

What are permissible requests "speeds?"
The API will cut you off if you make more than 30 requests over 5 seconds to any single endpoint.
We consider this a breach of the API interface contract, so ...